I think PCs with Blu-Ray disc drives are usually faster and more reliable than computers without a Blu-Ray disc drive.
I think computers needs a faster CPU, video card, RAM, and other parts to play 1080P Blu-Ray. If you want to play 4K Blu-Ray movie discs on a PC, you would need a newer 4K ready Blu-Ray disc drive, faster CPU and video card which is fast enough to display 4K movies.
A large number of computers without any disc drives or cheaper disc drives like CD-ROM and DVD-ROM are also generally slower because they use slower Intel Core i3, Celeron and Atoms CPU, and similar CPUs with slower integrated video which is mainly only good for web browsing, Office work, pictures, and online video. A lot of PCs which come with Intel Celeron/Atoms, and similar chips are usually cheaply built with lower quality parts, so they maybe less reliable.
But, a lot of computers with Blu-Ray disc drives come with Intel Core i5 and better CPUs, faster RAM, and faster video chips because more of their buyers will use the PC for video editing, gaming, playing Blu-Ray movies, and more hardware intensive tasks which need higher quality parts which are more reliable.
I think computers needs a faster CPU, video card, RAM, and other parts to play 1080P Blu-Ray. If you want to play 4K Blu-Ray movie discs on a PC, you would need a newer 4K ready Blu-Ray disc drive, faster CPU and video card which is fast enough to display 4K movies.
A large number of computers without any disc drives or cheaper disc drives like CD-ROM and DVD-ROM are also generally slower because they use slower Intel Core i3, Celeron and Atoms CPU, and similar CPUs with slower integrated video which is mainly only good for web browsing, Office work, pictures, and online video. A lot of PCs which come with Intel Celeron/Atoms, and similar chips are usually cheaply built with lower quality parts, so they maybe less reliable.
But, a lot of computers with Blu-Ray disc drives come with Intel Core i5 and better CPUs, faster RAM, and faster video chips because more of their buyers will use the PC for video editing, gaming, playing Blu-Ray movies, and more hardware intensive tasks which need higher quality parts which are more reliable.